I'm starting to think you have too much air in the tires. I run Hoosier 10.5X30. Foot braking I run 14.5 pounds. T-braking I run anywhere from 10-11 depending on the track. Foot braking I run a 1/4 turn of PL and T-braking one full turn.

Here's a vid of my last outing. 3200 RPM, 10.5 pounds in the tires with 1 full turn of pre load. Ranchos set at 2.

http://www.youtube.com/watch?v=-ejlLfrdf8I